メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((142.403449686398 44.1707510598873, 142.403453728351 44.170770409177, 142.402738398906 44.1706612290979, 142.402911742596 44.1701340653235, 142.402951521576 44.1700701285297, 142.402973548021 44.1700126165331, 142.402986629886 44.1699199748536, 142.403255097077 44.1699035834315, 142.403279241044 44.1699698957683, 142.403340771842 44.170166013931, 142.403419227294 44.170605175356, 142.403449686398 44.1707510598873)) ^^http://www.opengis.net/ont/geosparql#wktLiteral